With Rotter's scarring, one of the reasons he may like it hot is he lacks proper body temperature control.

Back when I drove an ambulance we transported a burn patient. A/C to her felt like someone was dunking her in Ice Water. She preferred it warmer because of that. The problem being that if a burn patient got too hot, they could go into heat distress very quickly, so there was a fine line of temperatures they could stand without being harmed.